Si3N4 ring resonator-based microwave photonic notch filter with an ultrahigh peak rejection

David Marpaung, Blair Morrison, Ravi Pant, Chris Roeloffzen, Arne Leinse, Marcel Hoekman, Rene Heideman, Benjamin J. Eggleton

    Research output: Contribution to journalArticleAcademicpeer-review

    94 Citations (Scopus)
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    Abstract

    We report a simple technique in microwave photonic (MWP) signal processing that allows the use of an optical filter with a shallow notch to exhibit a microwave notch filter with anomalously high rejection level. We implement this technique using a low-loss, tunable Si3N4 optical ring resonator as the optical filter, and achieved an MWP notch filter with an ultra-high peak rejection > 60 dB, a tunable high resolution bandwidth of 247-840 MHz, and notch frequency tuning of 2-8 GHz. To our knowledge, this is a record combined peak rejection and resolution for an integrated MWP filter.
    Original languageEnglish
    Pages (from-to)23286-23294
    Number of pages9
    JournalOptics express
    Volume21
    Issue number20
    DOIs
    Publication statusPublished - 24 Sep 2013

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